CN107620312A - High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation - Google Patents
High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation Download PDFInfo
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Abstract
The present invention relates to Metro station excavation artesian aquifer precipitation field, high hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in specially a kind of Metro station excavation, solves the closure problem that high water pressures decline well, including the well casing being arranged in Metro station excavation, well casing is closed steel pipe, well casing elevation of top is more than the absolute altitude of natural water level, and well casing runs through the bottom plate and top plate of station main body, water pump is provided with well casing；A kind of and high hydraulic pressure dewatering well hydrostatic slip casting method for blocking in Metro station excavation.The present invention forms closing space using agent structure and downcast well pipe, is risen automatically by water level after stopping pumping, and balance stratum and hydraulic pressure inside and outside dewatering well, forms hydrostatic, carries out slip casting closure, method is novel, and construction safety is reliable；The present invention is applied to the closure of all dewatering wells, but with the obvious advantage, the advanced technology in big hydraulic pressure, the diving of high water level or artesian water plugging dewatering well, and applied widely, practical, promotion prospect is good.
Description
Technical field
The present invention relates to Metro station excavation artesian aquifer precipitation field, Gao Shui in specially a kind of Metro station excavation
Pressure drop well structure and hydrostatic slip casting method for blocking.
Background technology
Fast-developing along with urbanization, track traffic and skyscraper are increasingly popularized, and deep foundation pit construction will present normal
State trend, in these engineerings, the processing of underground water is again the problem for first having to face.Because artesian aquifer drops in foundation ditch
Water demand or anti-dash forward of substrate gush demand, and Dewatering by pressure reduction well has been a kind of conventional dewatering mode in foundation ditch, but often in Gao Shui
Under head pressure, high hydraulic pressure plugging dewatering well is a problem again.How to solve that dewatering well bore is big, water level is high, anxious gushes the later stage
The problem of closure problem must take into consideration as modern architecture.Precipitation scheme is limited by such problem, tends not to make full use of only
The impermeable role of water curtain, water barrier, it is arranged with most economical, most effective way, extensive style precipitation is gone with building at present
Industry energy-conserving and environment-protective, the theory of precision management are incompatible with.
Symbol of the subway as contemporary cities development scale, is widely present in one, tier 2 cities, due to consideration that subway is applied
The matter of utmost importance faced for hypogee that works is base pit dewatering, and base pit dewatering mode adds support pile using water-stop curtain more,
Coordinate the combination that dewatering well is applied in foundation ditch.Wherein dewatering well is more based on Dewatering by pressure reduction, in main structure body complete man-hour, its
It is larger to block work difficulty.
A kind of waterproof of precipitation well in foundation pit of the disclosure of the invention of Application No. 200710113460.5 and plugging construction side
Method, a kind of Deep Foundation Pit Well-Point Dewatering pipe method for blocking of the disclosure of the invention of Application No. 201110436183.8, Application No.
The water-impervious plugging mechanism and its method for blocking of dewatering well on a kind of deep basal pit raft plate of 201611113125.0 disclosure of the invention.
Above-mentioned patent is that the closure of deep foundation pit precipitation well provides a variety of feasible patterns, but is not difficult to find out, the above method is both needed to dropping
A large amount of sandstones are backfilled in well as packed layer, even
The things such as cotton-wool are added, then casting concrete, last closed cover, process operation are complex again；It is simultaneously because above-mentioned
As earth excavation constantly moves down at the top of dewatering well in engineering, after the completion of buildings waterproof construction of bottom plates, dewatering well overhead height
Merely greater than 50~80 centimeters of bottom plate, once the termination of pumping when blocking dewatering well, because hydraulic pressure is larger, water level can be rapid in downcast well pipe
Rise, high hydraulic pressure effect under plugging construction difficulty it is larger, misoperation easily trigger underground water pour in down a chimney foundation ditch phenomenon hair
It is raw.
The content of the invention
In order to solve the closure problem that high water pressures decline well, the invention provides a kind of simple and easy, operation side
Just high hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in foundation ditch, widely applicable, closure is reliable and cost is relatively low.
The present invention is achieved through the following technical solutions：High hydraulic pressure precipitation well construction in a kind of Metro station excavation, bag
The well casing being arranged in Metro station excavation is included, well casing is closed steel pipe, and well casing elevation of top is more than the absolute altitude of natural water level, well
Pipe runs through the bottom plate and top plate of station main body, and water pump is provided with well casing.
In order to ensure well casing and the intersubjective obturation effect in station, well casing need to run through the bottom plate of station main body and top plate uses
Wall pipe water sealing structure.
The caliber of well casing is determined according to precipitation scheme and pump power, and the hole of dewatering well drilling is determined according to the caliber of well casing
Footpath.Well casing caliber adds 10 centimetres not less than water pump diameter, and the aperture of dewatering well drilling adds 15 centimetres to arrive well casing between well casing caliber
Caliber adds between 20 centimetres.
Well casing referred to through bottom plate using wall pipe water sealing structure, after the completion of bottom cushion construction, portion's steel pipe in the soleplate
The outer seal ring of upper welding, chamfering shape will be smeared into mortar at steel pipe and bottom plate, laying water-proof coiled material, volume is to bottom plate on waterproof roll
At thickness 1/3, using stirrup by coiled material banding to well casing, well casing is symmetrically applying expansion water-stop glue with bottom plate link position, applies
Brush completes after-pouring underplate concrete；Well casing is referred to through top plate using wall pipe water sealing structure, is located in well casing in the middle part of top plate
Position welds outer seal ring and fixes itself and roof steel bar, and well casing is symmetrically applying expansion water-stop glue with top plate link position, most
One-piece casting concrete afterwards；The brushing of expansion water-stop glue needs uniformly, continuously, to be shaped as wide 20mm, thick 10mm annular strip.
High hydraulic pressure dewatering well hydrostatic slip casting method for blocking in a kind of Metro station excavation, including following construction procedure：
S1, when station main body construction finish reach design strength and meet anti-floating requirement after, switch off the pump stop precipitation, make well casing
Interior water level recovers to natural water level automatically；
S2, after stable level in well casing, the lower Grouting Pipe in well casing so that Grouting Pipe ttom of pipe away from dewatering well bottom absolute altitude be 20~
25 centimetres, start slip casting after Grouting Pipe is fixed, Grouting Pipe is above carried to 3 meters of height after every 3 meters of slip casting and continues slip castings；It is past successively
It is multiple, slip casting to the high 3 meters of positions of station main body plate top surface, Grouting Pipe is pulled out, complete slip casting；
S3, after institute's injection slurry coagulation forming, extract out well casing in residual water, observe well casing in water level whether there is significant change to judge
Grouting quality simultaneously carries out next step construction or repaired；
S4, cut off well casing；
Injection slurry in the range of S5, cleaning downward 20 cm height of plate top surface, and seal ring in welding；
The microdilatancy for pouring a grade higher than station agent structure in the top plate and bottom plate well casing of S6, AT STATION main body respectively mixes
Solidifying soil and vibration compacting；
S7, top plate and backplate surface be subjected to cleaning reparation, comply with impression quality requirement.
Double slurries that injection slurry is prepared using cement and waterglass in step S2 and S3.Wherein, cement mortar and waterglass body
Product ratio 1：0.5, the cement mortar ratio of mud 1：1, grouting pressure 0.5~1.0MPA of first pressing, final pressure 2.0MPA.
Water level recovers to natural water level automatically in well casing in step S1, need to check the seal of dewatering well well casing, finds
Leak source carries out repair welding processing in time, needs to restart water pump if leak source is excessive, intractability is higher, reduces water level again
Afterwards, well casing leakage point is handled.
Step S4 cuts off well casing, refers to cut off part well casing and Roof between station main body plate top surface and top board undersurface
Part well casing more than face；The part well casing between plate top surface and top board undersurface is cut off, should first set up platform, by artificial along top
Plate bottom surface ring cuts open dewatering well well casing, confirms that well casing completely disengages with top board structure, selectes dewatering well well casing and puts upside down direction, edge
After well casing ring is cut 2/3 by plate top surface, after with jack well casing was slowly fallen and confirmed safety, remaining ring 1/3 is connected
Partial cut is connect, well casing otch is cleared up and cuts well casing inside points injection slurry, in case seal ring in welding.
Top plate and backplate surface are carried out cleaning reparation and referred to by step S7, the high grade microdilatancy coagulation poured in well casing
After native intensity reaches the 50% of design strength, the steel plate and top, bottom plate that cut off top plate bottom expose structured steel pipe, a small amount of if necessary broken
Except structure, it is ensured that steel pipe is cut off totally, and surface is handled with mortar, in the glue of body structure surface roller coating 502 and is applied after mortar drying
Brushing cement, reach surface reconditioning effect.
The present invention has the advantage that compared with prior art is with caused effect：
The design structure of the present invention is reasonable, and thinking is unique, simple to operate, safe and efficient, economic and practical.Utilize agent structure and drop
Well pipe forms closing space, is risen automatically by water level after stopping pumping, and balance stratum and hydraulic pressure inside and outside dewatering well, is formed quiet
Water, slip casting closure is carried out, method is novel, and construction safety is reliable；The present invention is applied to the closure of all dewatering wells, but in flood
With the obvious advantage, advanced technology in pressure, the diving of high water level or artesian water plugging dewatering well, it is applied widely, it is practical, promote
Prospect is good.
Brief description of the drawings
Fig. 1 intends blocking precipitation well construction and closure schematic diagram for the present invention；
Fig. 2 intends blocking the cross-sectional schematic diagram of precipitation well construction for the present invention；
Fig. 3 intends blocking dewatering well floor map for the present invention；
Fig. 4 intends blocking plugging dewatering well later stage schematic diagram for the present invention；
Fig. 5 is bottom plate dewatering well water-proofing treatment schematic diagram.
In figure：1- water pumps, 2- well casings, the drilling of 3- dewatering wells, 4- agent structures, the outer seal ring of 5- top plates, 6- bottom plates stop outside
Water ring, 7- Grouting Pipes, 8- back cover steel plates, seal ring in 9- top plates, seal ring in 10- bottom plates, 11- stirrups, 12- expansion water-stops
Glue, 13- grouting pumps, A- dewatering wells, B- top body plates, C- main body bottom plates, the high grade slightly expanded concretes of D-, E- waterproofs volume
Material, F- natural water levels, G- water-bearing layers.
Embodiment
The present invention is further elaborated with reference to Fig. 1-Fig. 5, the premise that the present invention is implemented is as well casing by closed steel pipe
2nd, top body plate B, main body bottom plate C form closed structure, and the top of well casing 2 is higher than natural water level F, and the bottom of well casing 2 should be according to
Design requirement extend into water-bearing layer G certain depth, and after ensureing that the later stage stops pumping, pulls out water pump 1, water level recovers in dewatering well
To natural water level F, underground water cannot be introduced into the inside of station agent structure 4.
According to design, dewatering well A construction is carried out, precipitation, earth excavation, agent structure 4 are constructed wherein in foundation ditch
It can one by one be carried out according to construction procedure, need to strengthen the protection to dewatering well A in work progress, avoid breakage in installation dewatering well A,
So as to influence the seal of well casing 2 so that the later stage caused when being blocked to dewatering well A in well casing 2 water level recover after underground water
Into inside agent structure 4.When well casing 2 is configured spreading, by welding fabrication, to ensure later stage waterproof effect, well
Pipe 2 is welded with seal ring 9 in top plate in top body plate B medium positions, it is contemplated that construction is convenient, can be in top body plate B upper surfaces
As the spreading point of well casing 2.
High hydraulic pressure precipitation well construction in a kind of Metro station excavation, including the well casing 2 being arranged in Metro station excavation, well
Pipe 2 is closed steel pipe, and the elevation of top of well casing 2 is more than natural water level F absolute altitude, and well casing 2 runs through the bottom of main structure of subway station 4
Plate and top plate, water pump 1 is provided with well casing 2.Well casing 2 uses wall pipe sealing through the bottom plate and top plate of subway station main body 4
Structure.The caliber of well casing 2 is determined according to precipitation scheme and the power of water pump 1, and dewatering well drilling 3 is determined according to the caliber of well casing 2
Aperture.The caliber of well casing 2 adds 10 centimetres not less than the diameter of water pump 1, and the aperture of dewatering well drilling 3 adds 15 centimetres between the caliber of well casing 2
Add to the caliber of well casing 2 between 20 centimetres.The size of well casing 2 is determined according to precipitation scheme and the power of water pump 1, according to the diameter of well casing 2
Dewatering well 3 diameters of drilling are determined, preferably, the diameter of optional well casing 2 is more than the diameter 10cm of water pump 1, dewatering well bore diameter is big
In well casing diameter 15cm, well casing 2, water pump 1 and 3 big I of dewatering well drilling slightly adjust.Well casing 2 is in the waterproof body of agent structure 4
Closed steel pipe is used in system.The elevation of top of well casing 2 need to be higher than natural water level F.
Well casing 2 is referred to through main body bottom plate C using wall pipe water sealing structure, after the completion of main body bottom plate C cushion constructions, in well
Pipe 2 is located at the outer seal ring 6 of main body bottom plate C medium positions welding bottom plate, will smear into chamfering with mortar at steel pipe and main body bottom plate C
Shape, on laying water-proof coiled material E, waterproof roll E at volume to main body bottom plate C thickness 1/3, using stirrup 11 by coiled material banding to well casing
On 2, well casing 2 is symmetrically applying expansion water-stop glue 12 with main body bottom plate C link positions, brushes and completes after-pouring main body bottom plate C coagulations
Soil；Well casing 2 is referred to through top body plate B using wall pipe water sealing structure, is located in well casing 2 outside top plate medium position welding top plate
Seal ring 5 simultaneously fixes itself and top body plate B reinforcing bars, and well casing 2 is symmetrically applying expansion water-stop glue with top body plate B link positions
12, last one-piece casting concrete；Expansion water-stop glue 12 is shaped as wide 20mm, thick 10mm annular strip, brush need uniformly,
Continuously.
High hydraulic pressure dewatering well hydrostatic slip casting method for blocking in a kind of Metro station excavation, including following construction procedure：
S1, when station main body construction finish reach design strength and meet anti-floating requirement after, switch off the pump 1 stopping precipitation, makes well
Water level recovers to natural water level automatically in pipe 2；The seal of inspection well casing 2 is needed in recovery process, it is found that leak source is located in time
Reason, if leak source is excessive, intractability is higher, then starts water pump 1, reduce water level again, leak well casing 2 is welded, really
After determining the airtight performance of well casing 2, water pump 1 is extracted, prepares slip casting；
S2, after stable level in well casing, the lower Grouting Pipe 7 in well casing 2 so that the ttom of pipe of Grouting Pipe 7 is away from dewatering well A bottoms absolute altitude
20~25 centimetres, start slip casting after Grouting Pipe 7 is fixed, Grouting Pipe 7 is above carried into 3 meters of height after every 3 meters of slip casting continues slip castings；According to
It is secondary reciprocal, slip casting to the station high 3 meters of positions of main body bottom plate C top surfaces, Grouting Pipe 7 is pulled out, complete slip casting.Wherein, grouting pump 13 is set
Put outside foundation ditch, slip casting, double slurries that injection slurry is prepared using cement and waterglass can be carried out to well casing 2 by Grouting Pipe 7
Liquid.
S3, slip casting finish, usual 4 hours, after the solidification of cement-silicate dual slurry, extract residual water in well casing 2 out, and see
The SEA LEVEL VARIATION situation logged well in pipe 2.After general observation 2~4 hours, the water level in well casing 2 then pastes without significant change in well casing 2
Perforate at nearly main body bottom plate C, and injecting cement paste is drilled through with electric drill, check percolating water situation, if it is determined that closure is completed, then under entering
One procedure.
S4, cut off well casing 2；By setting up platform, dewatering well A well casings 2 are cut off along top body plate B faces, confirm well casing 2 with
Top plate B structure completely disengages, the temporary weld of well casing 2 that then will be remained with reinforcing bar in the well casing 2 cut off and top plate B, to ensure
Well casing 2 cuts off safety at main body bottom plate C, and selected dewatering well A well casings 2 are put upside down direction, will be put upside down along main body bottom plate C away from well casing 2
Face cuts off 2/3, and further, slowly well casing 2 was fallen with jack, after confirming that the safety of well casing 2 falls down to the ground, cuts off remaining 1/3 well casing 2
Linkage section, clear up the otch of well casing 2 and cut the inside points injection slurry of well casing 2, in case seal ring 10 in welding bottom plate.
S5, cut off the injection slurry cleared up in the range of downward 20 cm height of main body bottom plate C top surfaces after remaining well casing 2, and
This height welds seal ring 10 in bottom plate, and seal ring 10 highly according to circumstances can be adjusted slightly in bottom plate；
S6, back cover steel plate 8 is welded on top body plate B lower surfaces well casing 2, respectively in top body plate B, main body after the completion of welding
Grade slightly expanded concrete D higher than agent structure 4, and vibration compacting are poured in bottom plate C well casings 2.
S7, top body plate B and main body bottom plate C Surface be subjected to cleaning reparation, comply with impression quality requirement.Newly pour
After the high grade slightly expanded concrete D intensity built reaches the 50% of design strength, steel plate 8 and the main body top at top plate B bottoms are cut off
Plate B and main body bottom plate C stressing mains structure 4 residual volume of well casing 2, can abolish agent structure 4 on a small quantity, it is ensured that well casing 2 if necessary
Cut off totally, further handle surface with mortar, in the glue of 4 surface roller coating of agent structure 502, brushing solid carbon dioxide after mortar drying
Mud, reach repairing effect.
Embodiment：
The construction of high hydraulic pressure plugging dewatering well in the Harbin Line 2 Metro ice and snow big world station foundation ditch that my company undertakes the construction of, utilize
Hydrostatic grouting method of the present invention, using big hydraulic pressure, high water level stratum in relief well in construction foundation pit, utilize main body
Structure forms closing space with downcast well pipe, is risen automatically by water level after stopping pumping, balance stratum and water inside and outside dewatering well
Pressure, hydrostatic is formed, complete slip casting closure, specific method is as follows：
Relief well structure design：Well casing structure and form are optimized when Dewatering by pressure reduction well designs in foundation ditch, utilize body junction
Structure and downcast well pipe form closing space, to ensure that the later stage stops pumping, pulls out water pump, water level recovers natural water level in dewatering well
Underground water does not enter subway station afterwards.
Wall pipe measures of preventing water is used between steel pipe and station bottom plate, top plate：Steel pipe passes through the inside and outside sealing of welding at top plate
Ring, integral, waterproof effect between guarantee steel pipe and top plate is poured with top plate, and steel pipe passes through the outer seal ring of welding and bottom plate at bottom plate
Pour integral, ensure waterproof effect between steel pipe and bottom plate, outer waterproofing layer is handled according to part through walls.
Dewatering by pressure reduction well construction：Decompression well construction is identical with common precipitation well construction in foundation ditch, simply in steel-pipe welding
Using full weld, ensure the hermetic seal effect of weld bond.Precipitation, earth excavation, main structure construction and common dewatering well drop in hole
Water, earth excavation, main structure construction process are identical, simply want to strengthen precipitation well protection in work progress, avoid breakage in installation
Dewatering well influences the seal of dewatering well, and underground water enters inside agent structure after the recovery of precipitation Well Water Level.Main body meets knot
Structure anti-floating requires and carries out shut-in well construction after reaching design strength.
Stop precipitation after water level recover automatically, needed in recovery process check dewatering well well casing seal, find leak source and
Shi Jinhang processing, if leak source is excessive, intractability is higher, starts water pump, reduces water level again, and leak well casing is welded
Connect, after determining dewatering well well casing airtight performance, extract water pump, prepare slip casting.
Hydrostatic slip casting：Including slip casting in lower Grouting Pipe in the setting of slip casting station, well and well casing；Grouting pump station is located at ground well head
Near, it can make using the grouting mode of the pipe of a pump one, slurries and use capacity as the electronic slurry mixers of 3-5m3, artificial loading,
Two level agitating mode；After stable level in well, lower Grouting Pipe to working face, to ensure that plugging dewatering well is closely knit, Grouting Pipe pipe
Bottom is far from shaft bottom 0.2m or so.Will be conscientiously by root inspection before down tube, it is ensured that Grouting Pipe is intact, eliminates mixed and disorderly substances in pipe, turns round everywhere
Pat suitable, prevent bending from fractureing or blocking；Well casing mouth fixes Grouting Pipe position before formal slip casting, then starts slip casting, slurries
Cement-silicate dual slurry typically is used, Grouting Pipe is up carried to 3m after every slip casting about 3m slurry amounts continues slip casting；It is reciprocal successively, note
Slurry pulls out Grouting Pipe to 3m on plate top surface.
Check that slip casting effect confirmation cuts off well casing after qualified：Well casing is cut off to be cut off and well at bottom plate including well casing at top plate
Pipe is cut off.It is by setting up platform that well casing, which is cut off, at top plate, cuts off dewatering well well casing along top plate face, confirms well casing and top board structure
Completely disengage, then welded well casing and top plate with reinforcing bar, it is ensured that well casing cuts off safety at bottom plate；It is logical that well casing, which is cut off, at bottom plate
Cross selected dewatering well well casing to put upside down direction, back side well casing is cut off 2/3 along base surface, well casing is swung on one side with jack, confirmed
After well casing falls down to the ground safely, the well casing of residue 1/3 is cut off, handles injecting cement paste in otch and pipe well.
Structural strengthening：Poured including the welding of interior seal ring and well casing inner concrete.Interior seal ring welding is surplus by cutting off
Injecting cement paste in bottom plate depth well casing is cleared up after remaining well casing, the seal ring in being welded in the middle part of top plate and bottom plate in steel pipe, seal ring thickness
Degree be advisable with 5mm, width for dewatering well internal diameter 1/3 preferably, according to circumstances can slightly adjust；It is to pass through that well casing inner concrete, which pours,
Back cover is welded in steel pipe upper plate lower surface, pours a label higher than result after the completion of welding in top plate, bottom plate steel pipe respectively
Slightly expanded concrete, and vibration compacting.
After the concrete strength poured reaches the 50% of design strength, the steel plate and top, bottom plate that cut off top plate bottom expose structure
Steel pipe, abolish structure on a small quantity if necessary, it is ensured that steel pipe is cut off totally, and surface is handled with mortar, in structure table after mortar drying
The glue of face roller coating 502, brushing dry cement, reaches repairing effect.
The present invention has filled up high hydraulic pressure dewatering well hydrostatic slip casting plugging construction technological gap, achieves good economic benefit
And social benefit.
Claims (10)
1. high hydraulic pressure precipitation well construction in a kind of Metro station excavation, including the well casing being arranged in Metro station excavation（2）, its
It is characterised by：Well casing（2）For closed steel pipe, well casing（2）Elevation of top is more than natural water level（F）Absolute altitude, well casing（2）Penetratingly
Iron station agent structure（4）Bottom plate and top plate, well casing（2）Inside it is provided with water pump（1）.
2. high hydraulic pressure precipitation well construction in a kind of Metro station excavation according to claim 1, it is characterised in that：Well casing
（2）Through subway station main body（4）Bottom plate and top plate use wall pipe water sealing structure.
3. high hydraulic pressure precipitation well construction in a kind of Metro station excavation according to claim 1, it is characterised in that：Well casing
（2）Caliber according to precipitation scheme and water pump（1）Power determines, according to well casing（2）Caliber determine dewatering well drill（3）Hole
Footpath.
4. high hydraulic pressure precipitation well construction in a kind of Metro station excavation according to claim 1 or 3, it is characterised in that：Well
Pipe（2）Caliber is not less than water pump（1）Diameter adds 10 centimetres, dewatering well drilling（3）Aperture between well casing（2）Caliber adds 15 centimetres
To well casing（2）Caliber adds between 20 centimetres.
5. high hydraulic pressure precipitation well construction in a kind of Metro station excavation according to claim 2, it is characterised in that：Well casing
（2）Through main body bottom plate（C）Referred to using wall pipe water sealing structure, main body bottom plate（C）After the completion of cushion construction, in well casing（2）
Positioned at main body bottom plate（C）The outer seal ring of medium position welding bottom plate（6）, by steel pipe and main body bottom plate（C）Smear into mortar in place
Horn shape, laying water-proof coiled material（E）, waterproof roll（E）Upper volume is to main body bottom plate（C）At thickness 1/3, using stirrup（11）By coiled material
Banding is to well casing（2）On, well casing（2）With main body bottom plate（C）Link position symmetrically applies expansion water-stop glue（12）, after the completion of brushing
Pour main body bottom plate（C）Concrete；Well casing（2）Through top body plate（B）Referred to using wall pipe water sealing structure, in well casing（2）
The seal ring outside top plate medium position welding top plate（5）And by itself and top body plate（B）Reinforcing bar is fixed, well casing（2）With master
Body top plate（B）Link position symmetrically applies expansion water-stop glue（12）, last one-piece casting concrete；Expansion water-stop glue（12）It is shaped as
Wide 20mm, thick 10mm annular strip, brushing needs uniformly, continuously.
A kind of 6. high hydraulic pressure dewatering well hydrostatic slip casting method for blocking in Metro station excavation, it is characterised in that：Including following construction
Step：
S1, when station main body construction finish reach design strength and meet anti-floating requirement after, switch off the pump（1）Stop precipitation, make
Well casing（2）Interior water level recovers to natural water level automatically；
S2, after stable level in well casing, in well casing（2）Interior lower Grouting Pipe（7）So that Grouting Pipe（7）Ttom of pipe is away from dewatering well（A）
Bottom absolute altitude is 20~25 centimetres, by Grouting Pipe（7）Start slip casting after fixation, by Grouting Pipe after every 3 meters of slip casting（7）Above carry 3 meters of height
Degree continues slip casting；It is reciprocal successively, slip casting to station main body bottom plate（C）The high 3 meters of positions of top surface, pull out Grouting Pipe（7）, complete note
Slurry；
S3, after institute's injection slurry coagulation forming, extract out well casing（2）Interior residual water, observe well casing（2）Interior water level whether there is significant change
To judge grouting quality and carry out next step construction or repaired；
S4, cut off well casing（2）；
S5, cleaning main body bottom plate（C）Injection slurry in the range of downward 20 cm height of top surface, and weld seal ring in bottom plate
（10）；
S6, in subway station top body plate（B）With main body bottom plate（C）Well casing（2）Inside pour respectively than station agent structure
（4）High grade slightly expanded concrete（D）And vibration compacting；
S7, by top body plate（B）With main body bottom plate（C）Surface carries out cleaning reparation, complies with impression quality requirement.
7. high hydraulic pressure dewatering well hydrostatic slip casting method for blocking in a kind of Metro station excavation according to claim 6, it is special
Sign is：Double slurries that injection slurry is prepared using cement and waterglass in step S2 and S3.
8. high hydraulic pressure dewatering well hydrostatic slip casting method for blocking in a kind of Metro station excavation according to claim 6, it is special
Sign is：Well casing in step S1（2）Interior water level recovers to natural water level automatically（F）Afterwards, dewatering well well casing need to be checked（2）It is closed
Property, it is found that leak source carries out repair welding processing in time, need to restart water pump if leak source is excessive, intractability is higher（1）, again
After reducing water level, to well casing（2）Leakage point is handled.
9. high hydraulic pressure dewatering well hydrostatic slip casting method for blocking in a kind of Metro station excavation according to claim 6, it is special
Sign is：Step S4 cuts off well casing（2）, refer to cut off station main body bottom plate（C）Top surface and top body plate（B）Part between bottom surface
Well casing（2）And top body plate（B）Part well casing more than top surface（2）；Cut off main body bottom plate（C）Top surface and top body plate（B）Bottom
Part well casing between face（2）, platform should be first set up, by manually cutting open dewatering well well casing along top board undersurface ring（2）, confirm well
Pipe（2）With top body plate（B）Structure completely disengages, and selectes dewatering well well casing（2）Put upside down direction, along main body bottom plate（C）Top surface will
Well casing（2）After ring cutting 2/3, with jack by well casing（2）After slowly falling and confirmed safety, by the remaining connecting portion of ring 1/3
Cutting is disconnected, clears up well casing（2）Otch simultaneously cuts well casing（2）Inside points injection slurry, in case seal ring in welding bottom plate（10）.
10. high hydraulic pressure dewatering well hydrostatic slip casting method for blocking in a kind of Metro station excavation according to claim 6, it is special
Sign is：Step S7 is by top body plate（B）With main body bottom plate（C）Surface carries out cleaning reparation and referred to, well casing（2）The height inside poured
After one grade slightly expanded concrete intensity reaches the 50% of design strength, top body plate is cut off（B）The back cover steel plate of bottom（8）, it is main
Body top plate（B）With main body bottom plate（C）Expose agent structure（4）Steel pipe, structure can be abolished on a small quantity if necessary, it is ensured that steel pipe is cut off
Totally, top body plate is handled with mortar（B）With main body bottom plate（C）Surface, after mortar drying after in its body structure surface roller coating 502
Glue and brushing dry cement, reach surface reconditioning effect.
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| CN108166517A (en) * | 2018-02-10 | 2018-06-15 | 中国建筑第五工程局有限公司 | For the shut-in well method and well-sealing device of superelevation floor height hydraulic pressure dewatering well of deep well |
| CN109083204A (en) * | 2018-09-27 | 2018-12-25 | 大连美宸特环保节能产品有限公司 | Rapid hardening liquid rubber spray-coating construction method |
| CN109518707A (en) * | 2018-12-19 | 2019-03-26 | 中国电建集团贵阳勘测设计研究院有限公司 | High-pressure large-flow underground water advanced plugging structure and plugging method |
| CN109629573A (en) * | 2019-01-15 | 2019-04-16 | 中交哈尔滨地铁投资建设有限公司 | A kind of pouch slip casting borehole wall water sealing structure |
| CN109706934A (en) * | 2019-01-18 | 2019-05-03 | 山东建勘集团有限公司 | Drapery injected device and its working method in a kind of artesian water stratum |
| CN109706935A (en) * | 2019-01-18 | 2019-05-03 | 山东建勘集团有限公司 | Anchor hole grouting for water blocking device and its working method in a kind of artesian water stratum |
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| CN110805052A (en) * | 2019-10-31 | 2020-02-18 | 中国二十二冶集团有限公司 | Comprehensive treatment method for sudden surge of ultra-deep foundation pit |
| CN111305245A (en) * | 2019-12-05 | 2020-06-19 | 中冶天工集团有限公司 | Confined water dewatering well sealing device and construction method |
| CN111981240A (en) * | 2020-06-30 | 2020-11-24 | 厦门安越非开挖工程技术股份有限公司 | Grouting water stopping method |
| CN112647524A (en) * | 2020-12-18 | 2021-04-13 | 中国五冶集团有限公司 | Plugging method for dewatering well in foundation pit |
| CN113174981A (en) * | 2021-04-23 | 2021-07-27 | 江苏固洲基础工程有限公司 | Plugging device of high water pressure deep well precipitation well |
| CN113482026A (en) * | 2021-07-18 | 2021-10-08 | 中天建设集团有限公司 | Plugging method and device for pressure-bearing dewatering well |
| CN114183126A (en) * | 2021-12-16 | 2022-03-15 | 上海长凯岩土工程有限公司 | Implementation method for ectopic water level observation of dewatering well |
| CN114482105A (en) * | 2022-03-18 | 2022-05-13 | 中铁一局集团有限公司 | Construction method for plugging dewatering well group with strong pressure water after ultra-deep subway station is sealed |
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| CN108166517A (en) * | 2018-02-10 | 2018-06-15 | 中国建筑第五工程局有限公司 | For the shut-in well method and well-sealing device of superelevation floor height hydraulic pressure dewatering well of deep well |
| CN108166517B (en) * | 2018-02-10 | 2023-10-27 | 中国建筑第五工程局有限公司 | Well sealing method and well sealing device for super high-rise high-water pressure deep well dewatering well |
| CN109083204A (en) * | 2018-09-27 | 2018-12-25 | 大连美宸特环保节能产品有限公司 | Rapid hardening liquid rubber spray-coating construction method |
| CN109518707A (en) * | 2018-12-19 | 2019-03-26 | 中国电建集团贵阳勘测设计研究院有限公司 | High-pressure large-flow underground water advanced plugging structure and plugging method |
| CN109518707B (en) * | 2018-12-19 | 2023-09-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Advanced plugging structure and plugging method for high-pressure high-flow groundwater |
| CN109629573A (en) * | 2019-01-15 | 2019-04-16 | 中交哈尔滨地铁投资建设有限公司 | A kind of pouch slip casting borehole wall water sealing structure |
| CN109706934A (en) * | 2019-01-18 | 2019-05-03 | 山东建勘集团有限公司 | Drapery injected device and its working method in a kind of artesian water stratum |
| CN109706935A (en) * | 2019-01-18 | 2019-05-03 | 山东建勘集团有限公司 | Anchor hole grouting for water blocking device and its working method in a kind of artesian water stratum |
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| CN109706935B (en) * | 2019-01-18 | 2023-10-17 | 山东建勘集团有限公司 | Anchor hole grouting water plugging device in pressure-bearing water stratum and working method thereof |
| CN109914452A (en) * | 2019-03-15 | 2019-06-21 | 五冶集团上海有限公司 | Deep well is shunt in a well method in a kind of foundation pit |
| CN110805052A (en) * | 2019-10-31 | 2020-02-18 | 中国二十二冶集团有限公司 | Comprehensive treatment method for sudden surge of ultra-deep foundation pit |
| CN110761291A (en) * | 2019-11-15 | 2020-02-07 | 中铁一局集团第二工程有限公司 | Anti-floating waterproof system and method applied to deep foundation pit in karst water-rich area |
| CN110761291B (en) * | 2019-11-15 | 2024-06-07 | 中铁一局集团第二工程有限公司 | Anti-floating waterproof system and method applied to karst water-rich region deep foundation pit |
| CN111305245A (en) * | 2019-12-05 | 2020-06-19 | 中冶天工集团有限公司 | Confined water dewatering well sealing device and construction method |
| CN111981240A (en) * | 2020-06-30 | 2020-11-24 | 厦门安越非开挖工程技术股份有限公司 | Grouting water stopping method |
| CN112647524A (en) * | 2020-12-18 | 2021-04-13 | 中国五冶集团有限公司 | Plugging method for dewatering well in foundation pit |
| CN113174981A (en) * | 2021-04-23 | 2021-07-27 | 江苏固洲基础工程有限公司 | Plugging device of high water pressure deep well precipitation well |
| CN113174981B (en) * | 2021-04-23 | 2022-01-11 | 江苏固洲基础工程有限公司 | Plugging device of high water pressure deep well precipitation well |
| CN113482026A (en) * | 2021-07-18 | 2021-10-08 | 中天建设集团有限公司 | Plugging method and device for pressure-bearing dewatering well |
| CN114183126B (en) * | 2021-12-16 | 2023-09-19 | 上海长凯岩土工程有限公司 | Implementation method for abnormal observation water level of precipitation well |
| CN114183126A (en) * | 2021-12-16 | 2022-03-15 | 上海长凯岩土工程有限公司 | Implementation method for ectopic water level observation of dewatering well |
| CN114482105A (en) * | 2022-03-18 | 2022-05-13 | 中铁一局集团有限公司 | Construction method for plugging dewatering well group with strong pressure water after ultra-deep subway station is sealed |
| CN114482105B (en) * | 2022-03-18 | 2024-04-16 | 中铁一局集团有限公司 | Precipitation well group plugging construction method with strong pressurized water after ultra-deep subway station is closed |
| CN114718099A (en) * | 2022-03-21 | 2022-07-08 | 中国五冶集团有限公司 | Well plugging device for dewatering well |
| CN115142453A (en) * | 2022-06-17 | 2022-10-04 | 中国建筑第八工程局有限公司 | Relief well structure in foundation pit and construction method thereof |
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Application publication date: 20180123 |